/* ==========================================================================
   TEACH COURSE - PREMIUM 3-COLOR MODERN THEME SYSTEM
   1. PRIMARY: Premium Blue (#1d4ed8 / #2563eb)
   2. SECONDARY: Teal / Cyan (#0d9488 / #0284c7)
   3. ACCENT: Elegant Purple (#7c3aed / #6d28d9)
   ========================================================================== */

:root {
    /* ── 1. PRIMARY: Premium Blue ── */
    --color-blue-deep: #0a192f;        /* Deepest Navy / Heading tone */
    --color-blue-navy: #1e3a8a;        /* Royal Navy */
    --color-blue-primary: #1d4ed8;     /* Rich Premium Blue (Action / Primary) */
    --color-blue-vibrant: #2563eb;     /* Vibrant Blue (CTAs, Hover, Active) */
    --color-blue-soft: #eff6ff;        /* Soft Blue tint */
    --color-blue-border: rgba(29, 78, 216, 0.22);

    /* ── 2. SECONDARY: Teal / Cyan ── */
    --color-teal: #0d9488;             /* Refined Teal (Icons, Badges, Checks) */
    --color-teal-dark: #0f766e;        /* Deep Teal */
    --color-cyan: #0284c7;             /* Clean Cyan */
    --color-teal-soft: #f0fdfa;        /* Soft Teal background */
    --color-teal-border: #99f6e4;      /* Delicate Teal border */

    /* ── 3. ACCENT: Elegant Purple ── */
    --color-purple: #7c3aed;           /* Elegant Violet / Purple (Offers, Badges) */
    --color-purple-dark: #6d28d9;      /* High-contrast Purple text */
    --color-purple-soft: #f5f3ff;      /* Soft Purple badge wash */
    --color-purple-border: #ddd6fe;    /* Delicate Purple border */

    /* ── Core Backgrounds ── */
    --bg-main: #f8fafc;                /* Slate 50: Clean, eye-friendly page background */
    --bg-surface: #ffffff;             /* Pure white for cards, headers, sections */
    --bg-card: #ffffff;
    --bg-card-hover: #ffffff;
    --bg-elevated: #ffffff;

    /* ── Text Color Hierarchy (High Contrast & Readability) ── */
    --text-pure: #0a192f;              /* Deep Navy: Main headings, highest contrast */
    --text-primary: #1e293b;           /* Slate 800: Strong card titles, subheadings */
    --text-secondary: #334155;         /* Slate 700: Clean dark gray body text */
    --text-muted: #64748b;             /* Slate 500: Soft gray meta labels, secondary text */
    --text-dim: #94a3b8;               /* Slate 400: Old price strikethrough, subtle borders */

    /* ── Backward-compatible Aliases for Existing Components ── */
    --accent-blue: var(--color-blue-primary);
    --accent-cyan: var(--color-blue-primary);
    --accent-purple: var(--color-purple);
    --accent-teal: var(--color-teal);
    --accent-emerald: var(--color-teal);

    /* ── Premium Soft Gradients ── */
    /* Primary CTA & Buy Now: Royal to Vibrant Blue with depth */
    --grad-brand: linear-gradient(135deg, #1d4ed8 0%, #2563eb 100%);
    --grad-primary: linear-gradient(135deg, #1e40af 0%, #2563eb 100%);
    
    /* Secondary Teal / Cyan Highlights */
    --grad-teal: linear-gradient(135deg, #0f766e 0%, #0d9488 100%);
    
    /* Special Offer & Discount Badges: Soft Elegant Purple Gradient */
    --grad-purple-soft: linear-gradient(135deg, #f5f3ff 0%, #ede9fe 100%);
    --grad-purple-badge: linear-gradient(135deg, #7c3aed 0%, #6d28d9 100%);

    /* Hindi Accent Gradient */
    --grad-hindi: linear-gradient(135deg, #1e40af 0%, #2563eb 100%);

    /* ── Borders ── */
    --border-subtle: rgba(10, 25, 47, 0.08);
    --border-medium: rgba(10, 25, 47, 0.14);
    --border-highlight: rgba(29, 78, 216, 0.22);
    --border-teal-subtle: rgba(13, 148, 136, 0.22);
    --border-purple-subtle: rgba(124, 58, 237, 0.22);

    /* ── Shadows ── */
    --shadow-sm: 0 2px 8px rgba(10, 25, 47, 0.04);
    --shadow-md: 0 8px 24px rgba(10, 25, 47, 0.06);
    --shadow-lg: 0 16px 40px rgba(10, 25, 47, 0.08);
    --shadow-glow-blue: 0 4px 16px rgba(29, 78, 216, 0.32);
    --shadow-glow-purple: 0 4px 16px rgba(124, 58, 237, 0.22);
    --shadow-glow-teal: 0 4px 16px rgba(13, 148, 136, 0.22);

    /* ── Form Inputs ── */
    --bg-input: #f8fafc;
    --border-input: #cbd5e1;
    --text-input: #0a192f;
}

/* ==========================================================================
   Global Base & Typography Overrides (Deep Navy & Clean Dark Gray)
   ========================================================================== */
body {
    background-color: var(--bg-main) !important;
    color: var(--text-secondary) !important;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--text-pure) !important;
}

h1 {
    color: #0a192f !important;
}

h2 {
    color: #0a192f !important;
}

h3 {
    color: #1e293b !important;
}

h4 {
    color: #1e293b !important;
}

p {
    color: var(--text-secondary) !important;
}

strong, b {
    color: var(--text-pure) !important;
}

/* Subtle Ambient Glows in Light Theme */
.ambient-glow {
    opacity: 0.06 !important;
}

/* ==========================================================================
   Header & Navigation Colors
   ========================================================================== */
.site-header {
    background: rgba(255, 255, 255, 0.97) !important;
    backdrop-filter: blur(14px) !important;
    -webkit-backdrop-filter: blur(14px) !important;
    border-bottom: 1px solid var(--border-subtle) !important;
    box-shadow: 0 2px 10px rgba(10, 25, 47, 0.03) !important;
}

.brand-name {
    color: #0a192f !important;
}

.brand-highlight {
    color: var(--color-blue-vibrant) !important;
    background: none !important;
    -webkit-text-fill-color: initial !important;
}

.brand-tagline {
    color: var(--text-muted) !important;
}

.logo-icon-wrapper {
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%) !important;
    border: 1px solid rgba(29, 78, 216, 0.22) !important;
    color: var(--color-blue-vibrant) !important;
    box-shadow: 0 2px 6px rgba(29, 78, 216, 0.12) !important;
}

.nav-link {
    color: var(--text-secondary) !important;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-blue-primary) !important;
}

.nav-link::after {
    background: var(--color-teal) !important;
}

.cart-icon-wrapper {
    color: var(--text-pure) !important;
}

.cart-icon-wrapper:hover {
    color: var(--color-blue-primary) !important;
}

.cart-badge {
    background: var(--color-blue-primary) !important;
    color: #ffffff !important;
    border: 2px solid #ffffff !important;
}

.mobile-toggle .bar {
    background-color: var(--text-pure) !important;
}

/* Mobile Drawer */
.mobile-drawer {
    background: #ffffff !important;
    border-top: 1px solid var(--border-subtle) !important;
    box-shadow: 0 10px 30px rgba(10, 25, 47, 0.08) !important;
}

.mobile-nav-link {
    color: var(--text-pure) !important;
}

.mobile-nav-link:hover {
    color: var(--color-blue-primary) !important;
}

.mobile-sub {
    color: var(--color-teal) !important;
}

/* ==========================================================================
   Buttons & CTAs High Contrast System (Primary Blue)
   ========================================================================== */
.btn-primary {
    background: var(--grad-brand) !important;
    color: #ffffff !important;
    box-shadow: var(--shadow-glow-blue) !important;
    border: none !important;
    font-weight: 700 !important;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #1e40af 0%, #1d4ed8 100%) !important;
    box-shadow: 0 8px 25px rgba(29, 78, 216, 0.42) !important;
    color: #ffffff !important;
}

.btn-outline {
    background: #ffffff !important;
    border: 1.5px solid #cbd5e1 !important;
    color: var(--text-pure) !important;
    font-weight: 600 !important;
    box-shadow: 0 1px 3px rgba(10, 25, 47, 0.04) !important;
}

.btn-outline:hover {
    background: var(--color-blue-soft) !important;
    border-color: var(--color-blue-vibrant) !important;
    color: var(--color-blue-primary) !important;
}

.btn-secondary {
    background: #f1f5f9 !important;
    border: 1px solid #e2e8f0 !important;
    color: var(--text-primary) !important;
}

.btn-secondary:hover {
    background: #e2e8f0 !important;
    color: var(--text-pure) !important;
}

.btn-header-cta {
    background: var(--grad-brand) !important;
    color: #ffffff !important;
}

/* ==========================================================================
   Card System Colors (Homepage, Category, Store)
   ========================================================================== */
.product-card,
.card,
.feature-card,
.step-card {
    background: #ffffff !important;
    border: 1px solid var(--border-subtle) !important;
    box-shadow: var(--shadow-sm) !important;
}

.product-card:hover,
.card:hover {
    box-shadow: var(--shadow-md) !important;
    border-color: var(--border-highlight) !important;
}

.card-title,
.product-card h3 {
    color: var(--text-pure) !important;
}

.card-desc,
.product-card p {
    color: var(--text-secondary) !important;
}

/* 2. Secondary Teal: Category Badges & Pills */
.product-category,
.badge-category {
    background: var(--color-teal-soft) !important;
    color: var(--color-teal) !important;
    border: 1px solid var(--color-teal-border) !important;
    font-weight: 700 !important;
}

/* 3. Accent Purple: Special Offers & Discount Badges */
.product-discount,
.badge-discount,
.modal-discount,
.special-offer-pill {
    background: var(--grad-purple-soft) !important;
    color: var(--color-purple-dark) !important;
    border: 1px solid var(--color-purple-border) !important;
    font-weight: 700 !important;
    letter-spacing: 0.02em !important;
}

/* 1. Primary Blue: Price System */
.product-price,
.card-price,
.modal-price {
    color: var(--color-blue-primary) !important;
    font-weight: 800 !important;
}

.product-mrp,
.card-mrp,
.modal-mrp {
    color: var(--text-dim) !important;
    text-decoration: line-through !important;
}

/* 2. Secondary Teal: Checkmarks & Icons */
.feature-card svg,
.step-card svg,
.pd-trust-strip svg,
.spec-pill svg {
    color: var(--color-teal) !important;
}

/* Category Filter Tabs: Purple on Active */
.filter-btn.active {
    background: var(--color-purple-soft) !important;
    color: var(--color-purple-dark) !important;
    border-color: var(--color-purple-border) !important;
    font-weight: 700 !important;
}

/* ==========================================================================
   Sticky Mobile Bottom Bar (Primary Blue & Deep Navy)
   ========================================================================== */
.mobile-sticky-bar {
    background: rgba(255, 255, 255, 0.98) !important;
    backdrop-filter: blur(14px) !important;
    -webkit-backdrop-filter: blur(14px) !important;
    border-top: 1px solid rgba(10, 25, 47, 0.1) !important;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.08) !important;
}

.sticky-label,
.msb-tag {
    color: var(--text-muted) !important;
    font-weight: 600 !important;
}

.sticky-price,
.msb-price {
    color: var(--color-blue-primary) !important;
    font-weight: 800 !important;
}

.btn-sticky-buy,
.msb-cta {
    background: var(--grad-brand) !important;
    color: #ffffff !important;
    border: none !important;
    font-weight: 700 !important;
    box-shadow: var(--shadow-glow-blue) !important;
}

/* ==========================================================================
   Modals & Form Inputs
   ========================================================================== */
.modal-backdrop,
.checkout-modal-backdrop {
    background: rgba(10, 25, 47, 0.65) !important;
    backdrop-filter: blur(6px) !important;
    -webkit-backdrop-filter: blur(6px) !important;
}

.modal-card,
.checkout-modal-card {
    background: #ffffff !important;
    border: 1px solid rgba(10, 25, 47, 0.1) !important;
    box-shadow: 0 20px 45px rgba(10, 25, 47, 0.18) !important;
}

.modal-title,
.checkout-modal-title {
    color: var(--text-pure) !important;
}

.modal-desc,
.checkout-modal-subtitle {
    color: var(--text-muted) !important;
}

.modal-close,
.checkout-modal-close {
    background: #f1f5f9 !important;
    border: 1px solid #e2e8f0 !important;
    color: #475569 !important;
}

.modal-close:hover,
.checkout-modal-close:hover {
    background: #e2e8f0 !important;
    color: var(--text-pure) !important;
}

.form-label,
.checkout-form-group label {
    color: var(--text-secondary) !important;
}

.form-input,
.checkout-form-group input,
select.form-input,
textarea.form-input {
    background: var(--bg-input) !important;
    border: 1px solid var(--border-input) !important;
    color: var(--text-input) !important;
}

.form-input:focus,
.checkout-form-group input:focus {
    border-color: var(--color-blue-primary) !important;
    background: #ffffff !important;
    box-shadow: 0 0 0 3px rgba(29, 78, 216, 0.15) !important;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
    background: #ffffff !important;
    border-top: 1px solid var(--border-subtle) !important;
    color: #475569 !important;
}

.footer-heading {
    color: var(--text-pure) !important;
}

.footer-nav a {
    color: var(--text-muted) !important;
}

.footer-nav a:hover {
    color: var(--color-blue-primary) !important;
}

.footer-about-text {
    color: var(--text-muted) !important;
}

.footer-bottom {
    border-top-color: rgba(10, 25, 47, 0.06) !important;
}

.footer-bottom p {
    color: var(--text-dim) !important;
}

/* ==========================================================================
   Cart Page Specific Classes
   ========================================================================== */
.cart-title {
    color: var(--text-pure) !important;
}

.cart-summary {
    background: #ffffff !important;
    border: 1px solid var(--border-subtle) !important;
    border-radius: 14px !important;
    padding: 1.5rem !important;
    box-shadow: var(--shadow-sm) !important;
}

.cart-summary h3 {
    color: var(--text-pure) !important;
}

.summary-row {
    color: var(--text-secondary) !important;
    border-bottom: 1px solid var(--border-subtle) !important;
    display: flex;
    justify-content: space-between;
    padding: 0.75rem 0;
}

.summary-total {
    color: var(--text-pure) !important;
    font-weight: 800 !important;
    font-size: 1.25rem !important;
}

.cart-item {
    background: #ffffff !important;
    border: 1px solid var(--border-subtle) !important;
    border-radius: 12px !important;
    padding: 1rem !important;
    margin-bottom: 1rem !important;
    box-shadow: var(--shadow-sm) !important;
}

.cart-item-title {
    color: var(--text-pure) !important;
}

.cart-item-price {
    color: var(--color-blue-primary) !important;
    font-weight: 800 !important;
}

.cart-item-remove {
    color: #ef4444 !important;
    background: transparent !important;
    border: none !important;
    cursor: pointer;
}

/* ==========================================================================
   Hindi Text Gradient Helper
   ========================================================================== */
.hindi-gradient {
    background: var(--grad-hindi);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: none;
}